mirror of
https://github.com/phpv8/v8js.git
synced 2024-11-09 23:08:41 +00:00
316 lines
8.9 KiB
C++
316 lines
8.9 KiB
C++
/*
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+----------------------------------------------------------------------+
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| PHP Version 5 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2016 The PHP Group |
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+----------------------------------------------------------------------+
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| http://www.opensource.org/licenses/mit-license.php MIT License |
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+----------------------------------------------------------------------+
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| Author: Jani Taskinen <jani.taskinen@iki.fi> |
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| Author: Patrick Reilly <preilly@php.net> |
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| Author: Stefan Siegl <stesie@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "php_v8js_macros.h"
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#include "v8js_v8.h"
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#include "v8js_timer.h"
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#include "v8js_exceptions.h"
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extern "C" {
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#include "ext/date/php_date.h"
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#include "ext/standard/php_string.h"
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#include "zend_interfaces.h"
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#include "zend_closures.h"
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#include "zend_exceptions.h"
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}
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#include <libplatform/libplatform.h>
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void v8js_v8_init(TSRMLS_D) /* {{{ */
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{
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/* Run only once; thread-local test first */
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if (V8JSG(v8_initialized)) {
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return;
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}
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/* Set thread-local flag, that V8 was initialized. */
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V8JSG(v8_initialized) = 1;
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#ifdef ZTS
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v8js_process_globals.lock.lock();
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if(v8js_process_globals.v8_initialized) {
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/* V8 already has been initialized by another thread */
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v8js_process_globals.lock.unlock();
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return;
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}
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#endif
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#if defined(PHP_V8_NATIVES_BLOB_PATH) && defined(PHP_V8_SNAPSHOT_BLOB_PATH)
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/* V8 doesn't work without startup data, load it. */
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v8::V8::InitializeExternalStartupData(
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PHP_V8_NATIVES_BLOB_PATH,
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PHP_V8_SNAPSHOT_BLOB_PATH
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);
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#endif
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v8js_process_globals.v8_platform = v8::platform::CreateDefaultPlatform();
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v8::V8::InitializePlatform(v8js_process_globals.v8_platform);
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/* Set V8 command line flags (must be done before V8::Initialize()!) */
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if (v8js_process_globals.v8_flags) {
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v8::V8::SetFlagsFromString(v8js_process_globals.v8_flags,
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strlen(v8js_process_globals.v8_flags));
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}
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/* Initialize V8 */
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v8::V8::Initialize();
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#ifdef ZTS
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v8js_process_globals.v8_initialized = 1;
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v8js_process_globals.lock.unlock();
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#endif
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}
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/* }}} */
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/**
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* Prepare V8 call trampoline with time & memory limit, exception handling, etc.
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*
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* The caller MUST check V8JSG(fatal_error_abort) and trigger further bailout
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* either immediately after this function returns (or possibly after freeing
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* heap allocated memory).
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*/
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void v8js_v8_call(v8js_ctx *c, zval **return_value,
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long flags, long time_limit, long memory_limit,
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std::function< v8::Local<v8::Value>(v8::Isolate *) >& v8_call TSRMLS_DC) /* {{{ */
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{
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char *tz = NULL;
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V8JS_CTX_PROLOGUE(c);
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V8JSG(timer_mutex).lock();
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c->time_limit_hit = false;
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c->memory_limit_hit = false;
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V8JSG(timer_mutex).unlock();
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/* Catch JS exceptions */
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v8::TryCatch try_catch;
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/* Set flags for runtime use */
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c->flags = flags;
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/* Check if timezone has been changed and notify V8 */
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tz = getenv("TZ");
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if (tz != NULL) {
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if (c->tz == NULL) {
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c->tz = strdup(tz);
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}
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else if (strcmp(c->tz, tz) != 0) {
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v8::Date::DateTimeConfigurationChangeNotification(c->isolate);
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free(c->tz);
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c->tz = strdup(tz);
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}
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}
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if (time_limit > 0 || memory_limit > 0) {
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// If timer thread is not running then start it
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if (!V8JSG(timer_thread)) {
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// If not, start timer thread
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V8JSG(timer_thread) = new std::thread(v8js_timer_thread, ZEND_MODULE_GLOBALS_BULK(v8js));
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}
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}
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/* Always pass the timer to the stack so there can be follow-up changes to
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* the time & memory limit. */
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v8js_timer_push(time_limit, memory_limit, c TSRMLS_CC);
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/* Execute script */
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c->in_execution++;
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v8::Local<v8::Value> result = v8_call(c->isolate);
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c->in_execution--;
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/* Pop our context from the stack and read (possibly updated) limits
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* into local variables. */
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V8JSG(timer_mutex).lock();
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v8js_timer_ctx *timer_ctx = V8JSG(timer_stack).front();
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V8JSG(timer_stack).pop_front();
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V8JSG(timer_mutex).unlock();
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time_limit = timer_ctx->time_limit;
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memory_limit = timer_ctx->memory_limit;
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efree(timer_ctx);
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if(!V8JSG(fatal_error_abort)) {
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char exception_string[64];
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if (c->time_limit_hit) {
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// Execution has been terminated due to time limit
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sprintf(exception_string, "Script time limit of %lu milliseconds exceeded", time_limit);
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zend_throw_exception(php_ce_v8js_time_limit_exception, exception_string, 0 TSRMLS_CC);
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return;
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}
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if (memory_limit && !c->memory_limit_hit) {
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// Re-check memory limit (very short executions might never be hit by timer thread)
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v8::HeapStatistics hs;
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isolate->GetHeapStatistics(&hs);
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if (hs.used_heap_size() > memory_limit) {
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isolate->LowMemoryNotification();
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isolate->GetHeapStatistics(&hs);
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if (hs.used_heap_size() > memory_limit) {
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c->memory_limit_hit = true;
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}
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}
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}
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if (c->memory_limit_hit) {
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// Execution has been terminated due to memory limit
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sprintf(exception_string, "Script memory limit of %lu bytes exceeded", memory_limit);
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zend_throw_exception(php_ce_v8js_memory_limit_exception, exception_string, 0 TSRMLS_CC);
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return;
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}
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if (!try_catch.CanContinue()) {
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// At this point we can't re-throw the exception
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return;
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}
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/* There was pending exception left from earlier executions -> throw to PHP */
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if (Z_TYPE(c->pending_exception) == IS_OBJECT) {
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zend_throw_exception_object(&c->pending_exception TSRMLS_CC);
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ZVAL_NULL(&c->pending_exception);
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}
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/* Handle runtime JS exceptions */
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if (try_catch.HasCaught()) {
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/* Pending exceptions are set only in outer caller, inner caller exceptions are always rethrown */
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if (c->in_execution < 1) {
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/* Report immediately if report_uncaught is true */
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if (c->report_uncaught) {
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v8js_throw_script_exception(c->isolate, &try_catch TSRMLS_CC);
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return;
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}
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/* Exception thrown from JS, preserve it for future execution */
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if (result.IsEmpty()) {
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v8js_create_script_exception(&c->pending_exception, c->isolate, &try_catch TSRMLS_CC);
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return;
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}
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}
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/* Rethrow back to JS */
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try_catch.ReThrow();
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return;
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}
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/* Convert V8 value to PHP value */
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if (return_value && !result.IsEmpty()) {
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v8js_to_zval(result, *return_value, flags, c->isolate TSRMLS_CC);
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}
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}
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}
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/* }}} */
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void v8js_terminate_execution(v8::Isolate *isolate) /* {{{ */
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{
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if(v8::V8::IsExecutionTerminating(isolate)) {
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/* Execution already terminating, needn't trigger it again and
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* especially must not execute the spinning loop (which would cause
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* crashes in V8 itself, at least with 4.2 and 4.3 version lines). */
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return;
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}
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/* Unfortunately just calling TerminateExecution on the isolate is not
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* enough, since v8 just marks the thread as "to be aborted" and doesn't
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* immediately do so. Hence we enter an endless loop after signalling
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* termination, so we definitely don't execute JS code after the exit()
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* statement. */
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v8::Locker locker(isolate);
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v8::Isolate::Scope isolate_scope(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::String> source = V8JS_STR("for(;;);");
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v8::Local<v8::Script> script = v8::Script::Compile(source);
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v8::V8::TerminateExecution(isolate);
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script->Run();
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}
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/* }}} */
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int v8js_get_properties_hash(v8::Handle<v8::Value> jsValue, HashTable *retval, int flags, v8::Isolate *isolate TSRMLS_DC) /* {{{ */
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{
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v8::Local<v8::Object> jsObj = jsValue->ToObject();
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if (!jsObj.IsEmpty()) {
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v8::Local<v8::Array> jsKeys = jsObj->GetPropertyNames();
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for (unsigned i = 0; i < jsKeys->Length(); i++)
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{
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v8::Local<v8::String> jsKey = jsKeys->Get(i)->ToString();
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/* Skip any prototype properties */
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if (!jsObj->HasOwnProperty(jsKey) && !jsObj->HasRealNamedProperty(jsKey) && !jsObj->HasRealNamedCallbackProperty(jsKey)) {
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continue;
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}
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v8::Local<v8::Value> jsVal = jsObj->Get(jsKey);
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v8::String::Utf8Value cstr(jsKey);
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const char *c_key = ToCString(cstr);
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zend_string *key = zend_string_init(c_key, jsKey->ToString()->Utf8Length(), 0);
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zval value;
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ZVAL_UNDEF(&value);
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if (jsVal->IsObject() && jsVal->ToObject()->InternalFieldCount() == 2) {
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/* This is a PHP object, passed to JS and back. */
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zend_object *object = reinterpret_cast<zend_object *>(jsVal->ToObject()->GetAlignedPointerFromInternalField(1));
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ZVAL_OBJ(&value, object);
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Z_ADDREF_P(&value);
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}
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else {
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if (v8js_to_zval(jsVal, &value, flags, isolate TSRMLS_CC) == FAILURE) {
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zval_ptr_dtor(&value);
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return FAILURE;
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}
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}
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if ((flags & V8JS_FLAG_FORCE_ARRAY) || jsValue->IsArray()) {
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zend_symtable_update(retval, key, &value);
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} else {
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zend_hash_update(retval, key, &value);
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}
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zend_string_release(key);
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}
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return SUCCESS;
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}
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return FAILURE;
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}
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/* }}} */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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* vim600: noet sw=4 ts=4 fdm=marker
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* vim<600: noet sw=4 ts=4
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*/
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